[Bug 93144] [radeonsi] Alien: Isolation bug

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93144

--- Comment #14 from Luzipher <luziphermcleod at yahoo.ie> ---
@Stepan Bakshaev, Comment #13: Well, it's a known issue. There is a video of
the same effects on youtube ( https://www.youtube.com/watch?v=n35hwmN3VmQ )
that was made shortly after the release. Also the developers said multiple
times it'd need OpenGL 4.3 and especially compute shaders - check Comment #8 or
the posts by Feral employees on the steam forum (for example post 32 from
[FERAL] Edwin here:
http://steamcommunity.com/app/214490/discussions/0/490123938446209677/#p3 ). I
don't think it's a bug if the game wants 4.3 and we only got 4.1, and I trust
the devs if they say it needs compute shaders. Of course it's a bit strange
that it looked better on i965 before they had compute shaders, according to
Tapani Pälli in Comment #12.

@Nicolai Hähnle, Comment #10: well, it fires up a dialog that the graphics
driver isn't supported and asks you if you want to continue anyway. I think I
didn't get that dialog when I forced mesa to 4.3 (it doesn't help). I actually
think it's not a bad idea to let the user decide.

To add some not-yet-mentioned info: the effect you see depends on the setting
for SSAO (Screen Space Ambient Occlusion). If you set it to "Off" or "Standard"
you'll get the flickery colours everywhere. If you set it to "HDAO" it's way
less flickery (fog still does), but way too dark. Maybe that's a hint why
radeonsi is different compared to i965 ?

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